Standard Fields

For each slot in the instance, the Instances Form displays a field where you can enter the information for that slot. The display and options for the field depend on the type of information that is included in the field. 

Note: These topics describe the default fields only. You can select different formats for the fields using Forms

Protégé-2000 provides the following fields for both Single and Multiple cardinality. For simplicity, only the Single cardinality is shown:

 

Field Type

Default Single Cardinality Field

Default Appearance

Boolean Field A checkbox field that describes a slot as true or false for this instance

Class Field A text display field and three buttons that allow you to specify a class as the value for this slot

Float Field A text entry field that verifies that the entered value is a valid decimal number
Instance Field A text display field and four buttons that allow you to specify an instance as the value for this slot
Integer Field A text entry field that verifies that the entered value is a valid whole number
String Field A text entry field
Symbol Field A drop-down list that allows you to select from a preset list of values

Single  vs. Multiple Fields

A multiple cardinality field is very similar to the corresponding single field. There are some common differences:

Single Field Multiple Field
Only allows one value. Entering a new value means removing the old one. Allows multiple values. 
Some fields (e.g., Float, Integer, Symbol) do not have Field Buttons.

Always have Field Buttons which allow you to view, add or create, and delete values for the field.

To add a value, click on the Add or Create Field Button. The way you enter a value depends on the field type. For example, you may choose values from a list, or you may simply type your value in a pop-up entry window.


Next: The Boolean Fields

Instances Table of Contents